CN113890007A - Prepackage type power supply and distribution system - Google Patents
Prepackage type power supply and distribution system Download PDFInfo
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- CN113890007A CN113890007A CN202010634051.5A CN202010634051A CN113890007A CN 113890007 A CN113890007 A CN 113890007A CN 202010634051 A CN202010634051 A CN 202010634051A CN 113890007 A CN113890007 A CN 113890007A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/02—Circuit arrangements for AC mains or AC distribution networks using a single network for simultaneous distribution of AC power at different frequencies
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2105/00—Networks for supplying or distributing electric power characterised by their spatial reach or by the load
- H02J2105/10—Local stationary networks having a local or delimited stationary reach
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Abstract
本发明实施例涉及供配电系统技术领域，公开了预装式供配电系统。本发明实施例提供的一类预装式供配电系统，所述预装式供配电系统包括有分别部署于独立空间单元中的高压配电单元、变压配电单元、低压配电单元、双向变换单元、直流配电单元、交流配电单元、储能单元及联络开关单元；高压配电单元与变压配电单元连接，变压配电单元与低压配电单元连接，低压配电单元与双向变换单元连接；双向变换单元分别与直流配电单元、交流配电单元、储能单元及联络开关单元连接。可见，本发明实施例提供的预装式供配电系统在结构上更加灵活，提供的供配电功能可以更好地适应于不同类型的部署场景，从而解决了供配电系统系统结构固化，灵活性不高的技术问题。
Embodiments of the present invention relate to the technical field of power supply and distribution systems, and disclose a pre-installed power supply and distribution system. A type of pre-installed power supply and distribution system provided by the embodiment of the present invention includes a high-voltage power distribution unit, a transformer power distribution unit, and a low-voltage power distribution unit that are respectively deployed in independent space units , two-way conversion unit, DC power distribution unit, AC power distribution unit, energy storage unit and tie switch unit; The unit is connected with the bidirectional conversion unit; the bidirectional conversion unit is respectively connected with the DC power distribution unit, the AC power distribution unit, the energy storage unit and the tie switch unit. It can be seen that the prefabricated power supply and distribution system provided by the embodiment of the present invention is more flexible in structure, and the provided power supply and distribution function can be better adapted to different types of deployment scenarios, thereby solving the problem of the solidification of the power supply and distribution system system structure. Technical issues with low flexibility.
Description
Technical Field
The invention relates to the technical field of power supply and distribution systems, in particular to a pre-installed power supply and distribution system.
Background
With the continuous development of 5G infrastructure communication facilities and data centers, the deployment requirements of power supply and distribution systems under various different deployment scenes occur, for example, the power supply and distribution systems required under the deployment scenes of power supply and distribution deployment scenes of emergency data communication equipment, rapid deployment scenes of communication facilities, and the like.
However, it is difficult to meet the power supply and distribution requirements in these deployment scenarios by using the system structure of the conventional power supply and distribution system and the deployment means thereof.
The traditional power supply and distribution system is deployed by reserving space during building electrical design, or upgrading the power supply and distribution system by adopting a spare transformer so as to facilitate the capacity expansion operation of the subsequent power supply and distribution system.
It can be seen that the current system structure and the deployment method of the power supply and distribution system have the condition that the current requirement or the expected requirement cannot be met.
For the convenience of understanding, the power supply and distribution system actually required in different deployment scenarios can be analyzed specifically, and firstly, with the improvement of computing power and the rapid increase of communication rate, the total power capacity of the power supply and distribution facility site required by 5G is greatly improved compared with 2G to 4G, and can be multiplied.
Secondly, as a technical development trend, computing nodes required for development of electric vehicles, distributed energy sources and distributed energy storage are sunk to an edge layer.
Therefore, distributed computing and edge computing generate revolutionary challenges for the existing deployment structure taking a large data center as a computing backbone node, and naturally, challenges are also provided for a power supply and distribution system which is adaptive to computing capacity.
Meanwhile, the arrangement of the edge computing data center is different from that of the traditional large data center, and the voltage levels of power supply lines at different distribution positions of the edge computing data center are different.
Therefore, the system structure of the traditional power supply and distribution system with the structure solidification and the power supply and distribution solidification is difficult to be directly applied to the deployment scene of the edge computing data center.
In summary, the power supply and distribution requirements under different types of deployment scenarios show that the existing power supply and distribution system has the technical problems of system structure solidification and low flexibility.
Disclosure of Invention
In order to solve the technical problems of solidification and low flexibility of a power supply and distribution system structure, the embodiment of the invention provides a pre-installed power supply and distribution system.
In a first aspect, an embodiment of the present invention provides a pre-installed power distribution system, where the pre-installed power distribution system includes a high-voltage power distribution unit, a variable-voltage power distribution unit, a low-voltage power distribution unit, a bidirectional conversion unit, a direct-current power distribution unit, an alternating-current power distribution unit, an energy storage unit, and an interconnection switch unit, which are respectively disposed in independent space units;
the high-voltage power distribution unit is connected with the transformation power distribution unit, the transformation power distribution unit is connected with the low-voltage power distribution unit, and the low-voltage power distribution unit is connected with the bidirectional transformation unit;
the bidirectional conversion unit is respectively connected with the direct current power distribution unit, the alternating current power distribution unit, the energy storage unit and the interconnection switch unit;
the high-voltage power distribution unit is used for performing high-voltage power distribution operation;
the transformation power distribution unit is used for performing voltage conversion operation between high voltage electricity and low voltage electricity;
the low-voltage power distribution unit is used for carrying out low-voltage power distribution operation;
the bidirectional conversion unit is used for converting alternating current and direct current in a bidirectional mode;
the direct current power distribution unit is used for performing direct current power distribution operation;
the alternating current power distribution unit is used for performing alternating current power distribution operation;
the energy storage unit is used for carrying out energy storage operation;
and the interconnection switch unit is used for externally connecting external power supply and distribution equipment.
Preferably, the external power supply and distribution equipment is a target preassembled power supply and distribution system;
and the interconnection switch unit is connected with a target interconnection switch unit in the target pre-installed power supply and distribution system.
Preferably, the high-voltage power distribution unit, the transformation power distribution unit, the low-voltage power distribution unit, the bidirectional conversion unit, the direct-current power distribution unit, the alternating-current power distribution unit, the energy storage unit and the interconnection switch unit are detachably connected with each other.
Preferably, the high voltage power distribution unit comprises a first preset number of high voltage power distribution switches;
and a high-voltage power distribution port to be connected into a power supply and distribution system is connected with the inlet wire of the high-voltage power distribution switch, and the outlet wire of the high-voltage power distribution switch is connected with the variable-voltage power distribution unit.
Preferably, the transformation and distribution unit comprises a second preset number of dry-type transformers;
the high-voltage distribution unit is connected with the incoming line of the dry-type transformer, and the outgoing line of the dry-type transformer is connected with the low-voltage distribution unit.
Preferably, the low voltage power distribution unit comprises a third preset number of first low voltage switches;
the transformation power distribution unit is connected with the first end of the first low-voltage switch, and the second end of the first low-voltage switch is connected with a preset alternating current bus.
Preferably, the low voltage power distribution unit further comprises a second low voltage switch;
and the first end of the second low-voltage switch is connected with a rated alternating current power supply, and the second end of the second low-voltage switch is connected with the preset alternating current bus.
Preferably, the bidirectional conversion unit includes a bidirectional alternating current AC/direct current DC converter;
and an alternating current side interface of the bidirectional AC/DC converter is connected with a preset alternating current bus, and a direct current side interface of the bidirectional AC/DC converter is connected with a preset direct current bus.
Preferably, the tie switch unit comprises a high voltage dc contactor;
the first end of the high-voltage direct-current contactor is connected with a preset direct-current bus;
and the second end of the high-voltage direct current contactor is used for being connected into the external power supply and distribution equipment.
Preferably, the direct current distribution unit includes a bidirectional DC/DC conversion unit;
a first direct current side interface of the bidirectional DC/DC conversion unit is connected with a preset direct current bus;
the second direct-current side interface of the bidirectional DC/DC conversion unit is used for accessing a direct-current load;
wherein the alternating current distribution unit comprises a DC/AC conversion unit;
the direct-current side interface of the DC/AC conversion unit is connected with a preset direct-current bus;
the alternating current side interface of the DC/AC conversion unit is used for accessing an alternating current load;
wherein the energy storage unit comprises a DC/DC conversion unit;
the input end of the DC/DC conversion unit is connected with external energy storage equipment;
and the output end of the DC/DC conversion unit is connected with a preset direct current bus.
The preassembled power supply and distribution system provided by the embodiment of the invention comprises a high-voltage power distribution unit, a variable-voltage power distribution unit, a low-voltage power distribution unit, a bidirectional conversion unit, a direct-current power distribution unit, an alternating-current power distribution unit, an energy storage unit and an interconnection switch unit which are respectively arranged in an independent space unit; the high-voltage power distribution unit is connected with the variable-voltage power distribution unit, the variable-voltage power distribution unit is connected with the low-voltage power distribution unit, and the low-voltage power distribution unit is connected with the bidirectional conversion unit; the bidirectional conversion unit is respectively connected with the direct current power distribution unit, the alternating current power distribution unit, the energy storage unit and the interconnection switch unit; the high-voltage distribution unit is used for carrying out high-voltage distribution operation; a transformation and distribution unit for performing voltage conversion operation between high voltage and low voltage; a low voltage distribution unit for performing a low voltage distribution operation; a bidirectional conversion unit for performing a conversion operation between alternating current and direct current in a bidirectional manner; the direct current power distribution unit is used for performing direct current power distribution operation; the alternating current power distribution unit is used for carrying out alternating current power distribution operation; the energy storage unit is used for carrying out energy storage operation; and the interconnection switch unit is used for externally connecting external power supply and distribution equipment. Therefore, the system structure described by the pre-installed power supply and distribution system provided by the embodiment of the invention is more flexible in structure, and the provided power supply and distribution function can be better suitable for different types of deployment scenes, so that the technical problems of solidification and low flexibility of the structure of the power supply and distribution system are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a preassembled power distribution system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a preassembled power distribution system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a preassembled power distribution system according to another embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a prefabricated power distribution system according to an embodiment of the present invention, as shown in fig. 1, the prefabricated power distribution system includes a high-voltage power distribution unit 10, a variable-voltage power distribution unit 20, a low-voltage power distribution unit 30, a bidirectional conversion unit 40, a dc power distribution unit 50, an ac power distribution unit 60, an energy storage unit 70, and an interconnection switch unit 80, which are respectively disposed in independent space units;
the high-voltage power distribution unit 10 is connected with the transformation power distribution unit 20, the transformation power distribution unit 20 is connected with the low-voltage power distribution unit 30, and the low-voltage power distribution unit 30 is connected with the bidirectional conversion unit 40;
the bidirectional conversion unit 40 is respectively connected to the dc power distribution unit 50, the ac power distribution unit 60, the energy storage unit 70, and the interconnection switch unit 80;
the high-voltage power distribution unit 10 is used for performing high-voltage power distribution operation;
the transformation power distribution unit 20 is used for performing voltage conversion operation between high voltage electricity and low voltage electricity;
the low-voltage power distribution unit 30 is used for performing low-voltage power distribution operation;
the bidirectional conversion unit 40 is used for performing conversion operation between alternating current and direct current in a bidirectional manner;
the direct current power distribution unit 50 is used for performing direct current power distribution operation;
the alternating current distribution unit 60 is used for performing alternating current distribution operation;
the energy storage unit 70 is used for performing energy storage operation;
the interconnection switch unit 80 is used for externally connecting external power supply and distribution equipment.
In this embodiment, a novel power supply and distribution system is provided, which mainly comprises 8 parts, namely a high-voltage power distribution unit 10, a variable-voltage power distribution unit 20, a low-voltage power distribution unit 30, a bidirectional conversion unit 40, a direct-current power distribution unit 50, an alternating-current power distribution unit 60, an energy storage unit 70, and an interconnection switch unit 80.
Wherein the 8 parts are respectively disposed in independent space units.
For example, the independent space unit where the high-voltage power distribution unit 10 is located may be referred to as a high-voltage cabin, the independent space unit where the variable-voltage power distribution unit 20 is located may be referred to as a variable-voltage cabin, the independent space unit where the low-voltage power distribution unit 30 is located may be referred to as a low-voltage cabin, the independent space unit where the bidirectional conversion unit 40 is located may be referred to as a bidirectional conversion cabin, the independent space unit where the dc power distribution unit 50 is located may be referred to as a dc power distribution cabin, the independent space unit where the ac power distribution unit 60 is located may be referred to as an ac power distribution cabin, the independent space unit where the energy storage unit 70 is located may be referred to as an energy storage cabin, and the interconnection switch unit 80 may be referred to as an independent space unit interconnection switch cabin.
It should be understood that the system structure described in the pre-installed power supply and distribution system provided by the embodiment of the present invention is more flexible in structure, and the provided power supply and distribution function can be better adapted to different types of deployment scenarios, so as to solve the technical problem of low flexibility due to the structural solidification of the power supply and distribution system.
In the case of the interconnection switch unit 80, the external power supply and distribution equipment that can be externally connected to the interconnection switch unit 80 may be a dc bidirectional power supply.
Further, in different types of deployment scenarios, for example, data centers corresponding to edge computing, the edge computing data centers have characteristics of wide distribution positions and possibly different voltage levels of power supply lines where the data centers are located, and these characteristics cause operational difficulties in rapid introduction and setting of communication power supply and distribution.
However, embodiments of the present invention may advantageously overcome this operational difficulty.
Particularly, the abundant power distribution units in the embodiment of the invention improve the access capability and the power supply and distribution capability aiming at the voltage access points with different voltage grades, the voltage access points with different positions and different load capacities.
Further, under the scenes of capacity expansion of a traditional data center, capacity expansion of a communication machine room, emergency set-up and quick set-up, the novel power supply and distribution system provided by the embodiment of the invention can realize quick, reliable, reusable, extensible and mutually-economical quick deployment behaviors due to the standardized characteristic of the structure of the novel power supply and distribution system.
Furthermore, the novel power supply and distribution system provided by the embodiment of the invention can complete debugging of each unit in a factory due to the preassembly characteristic, so that the novel power supply and distribution system greatly saves deployment time when actually being deployed on the ground, and can meet the deployment requirements of power supply and distribution of a data center or a communication machine room for rapid deployment or emergency deployment.
Further, the preassembled power supply and distribution system provided by the embodiment of the present invention may specifically be a preassembled communication power supply and distribution system.
The preassembled power supply and distribution system provided by the embodiment of the invention comprises a high-voltage power distribution unit 10, a variable-voltage power distribution unit 20, a low-voltage power distribution unit 30, a bidirectional conversion unit 40, a direct-current power distribution unit 50, an alternating-current power distribution unit 60, an energy storage unit 70 and an interconnection switch unit 80 which are respectively arranged in independent space units; the high-voltage distribution unit 10 is connected with the transformation distribution unit 20, the transformation distribution unit 20 is connected with the low-voltage distribution unit 30, and the low-voltage distribution unit 30 is connected with the bidirectional transformation unit 40; the bidirectional conversion unit 40 is respectively connected with the direct current distribution unit 50, the alternating current distribution unit 60, the energy storage unit 70 and the interconnection switch unit 80; a high voltage distribution unit 10 for performing a high voltage distribution operation; a transformation and distribution unit 20 for performing a voltage conversion operation between a high voltage and a low voltage; a low voltage distribution unit 30 for performing a low voltage distribution operation; a bidirectional conversion unit 40 for bidirectionally performing a conversion operation between alternating current and direct current; a dc distribution unit 50 for performing a dc distribution operation; an ac distribution unit 60 for performing an ac distribution operation; an energy storage unit 70 for performing an energy storage operation; and the interconnection switch unit 80 is used for externally connecting external power supply and distribution equipment. Therefore, the system structure described by the pre-installed power supply and distribution system provided by the embodiment of the invention is more flexible in structure, and the provided power supply and distribution function can be better suitable for different types of deployment scenes, so that the technical problems of solidification and low flexibility of the structure of the power supply and distribution system are solved.
Fig. 2 is a schematic structural diagram of a preassembled power distribution system according to another embodiment of the present invention, where another embodiment of the present invention is based on the embodiment shown in fig. 1.
In this embodiment, the high voltage distribution unit 10 includes a first preset number of high voltage distribution switches;
and a high-voltage power distribution port to be connected into a power supply and distribution system is connected with the inlet wire of the high-voltage power distribution switch, and the outlet wire of the high-voltage power distribution switch is connected with the variable-voltage power distribution unit 20.
It will be appreciated that the first predetermined number may be 2 in terms of high voltage bays, i.e. there are two sets of electrically operated high voltage distribution switches, a first set of high voltage distribution switches HVK1, and a second set of high voltage distribution switches HVK 2.
Further, in the case of a power supply device that is connected to the incoming line of the high-voltage distribution switch, the power supply device may be a power supply and distribution system to be connected.
Specifically, a first high-voltage distribution port and a second high-voltage distribution port of the power supply and distribution system to be accessed can be respectively connected with an incoming line of a first group of high-voltage distribution switches HVK1 and an incoming line of a second group of high-voltage distribution switches HVK 2.
Further, the inlet wire side of the high-voltage distribution switch can be connected with a high-voltage side electric energy metering device, wherein the high-voltage side electric energy metering device is used for bidirectional metering.
The receiving voltage range of the high-voltage distribution port to be connected into the power supply and distribution system is 6kV to 35kV, and the two groups of high-voltage distribution switches can be connected with voltages of different grades.
Further, the high-voltage distribution switch may be embodied as a circuit breaker, a load switch, a knife switch, and the like.
On the basis of the above embodiments, preferably, the transforming and distributing unit 20 includes a second preset number of dry-type transformers;
the high-voltage distribution unit 10 is connected with the incoming line of the dry-type transformer, and the outgoing line of the dry-type transformer is connected with the low-voltage distribution unit 30.
It is understood that the second predetermined number may be 2 in terms of the transforming bins, i.e., the transforming bins may contain 2 dry-type transformers, i.e., the first dry-type transformer T1 and the second dry-type transformer T2.
It can be seen that the high side voltage levels may correspond to the high voltage distribution ports, respectively, and the low side voltage levels may all be set to 400V.
Furthermore, the outgoing line side of the dry-type transformer can be connected with a low-voltage side electric energy metering device, wherein the low-voltage side electric energy metering device is used for bidirectional metering.
Therefore, the outgoing line of the high-voltage distribution switch in the high-voltage cabin can be connected with the incoming line, namely the high-voltage side, of the dry-type transformer in the transformation cabin. Namely, the outgoing lines of the first group of high-voltage distribution switch HVK1 and the second group of high-voltage distribution switch HVK2 are respectively connected with the high-voltage sides of the first dry-type transformer T1 and the second dry-type transformer T2 in the transformer cabin.
On the basis of the above embodiment, preferably, the low-voltage distribution unit 30 includes a third preset number of first low-voltage switches;
the transformation and distribution unit 20 is connected with a first end of the first low-voltage switch, and a second end of the first low-voltage switch is connected with a preset alternating current bus.
It is understood that the third predetermined number may be 2 for the low voltage bins, i.e., the low voltage bins may include 2 first low voltage switches, which are denoted as LVK1 and LVK 2.
Therefore, the outgoing line of the dry-type transformer in the transformation bin can be connected with the first end of the first low-voltage switch in the low-voltage bin.
On the basis of the above embodiment, preferably, the low voltage distribution unit 30 further includes a second low voltage switch;
and the first end of the second low-voltage switch is connected with a rated alternating current power supply, and the second end of the second low-voltage switch is connected with the preset alternating current bus.
It will be appreciated that in the case of the low pressure compartment, a second low pressure switch, which may be noted as LVK3, may also be included.
It can be seen that the low-voltage cabin can include 3 groups of low-voltage switches, and 3 groups of low-voltage switches all converge at preset alternating current bus.
The rated voltage of the preset alternating current bus can be 400V, and the supported current can be not more than 5000A.
Further, the predetermined ac bus may be disposed in the low voltage distribution unit 30, that is, the low voltage distribution unit 30 may include the predetermined ac bus. Of course, the directionality of the preset alternating current bus is not limited here, and the alternating current bus can only pass through the low-voltage cabin.
Further, an energy metering device, which may be a bidirectional meter, may also be included near the second low-voltage switch in the low-voltage power distribution unit 30.
Specifically, the first end of the second low-voltage switch may also be referred to as a low-voltage bidirectional port LP, the low-voltage bidirectional port LP may also be connected to the first end of the bidirectional metering electric energy metering device, and the second end of the electric energy metering device is connected to the rated ac power supply.
The low-voltage bidirectional port LP is used for accessing a rated alternating current power supply which runs in parallel with an alternating current bus preset in the low-voltage cabin.
Wherein, the rated alternating current power supply can be a rated alternating current 400V diesel engine or commercial power.
On the basis of the above embodiment, preferably, the bidirectional conversion unit 40 includes a bidirectional alternating current AC/direct current DC converter;
and an alternating current side interface of the bidirectional AC/DC converter is connected with a preset alternating current bus, and a direct current side interface of the bidirectional AC/DC converter is connected with a preset direct current bus.
As can be understood, in the case of the bidirectional conversion bin, a bidirectional Alternating Current (AC)/Direct Current (DC) converter is included in the bidirectional conversion unit 40.
The bidirectional AC/DC converter may be an isolated power electronic converter with bidirectional electric energy flow direction, high power density, high efficiency, and is a kind of AC/DC conversion unit.
More specifically, the bidirectional AC/DC converter may be composed of a plurality of AC/DC conversion units connected in parallel, and the AC side interfaces of all the conversion units are connected in parallel with a preset AC bus in the low-voltage compartment, and the DC side interfaces are connected with a preset DC bus rated at 600V, and the DC side voltage range is 300 to 1500V.
Therefore, the alternating current side interface of the bidirectional AC/DC converter is connected with the preset alternating current bus in parallel.
In terms of the connection of the preset ac bus bar shown in fig. 2 with other elements, only the connection relationship between the elements is shown, and the connection manner is not limited, for example, the connection manner may be parallel.
Further, the directionality of the preset dc bus is not limited herein, and may only pass through the bidirectional conversion bin.
On the basis of the above embodiment, preferably, the tie switch unit 80 includes a high voltage dc contactor DCJ 1;
the first end of the high-voltage direct current contactor DCJ1 is connected with a preset direct current bus;
and the second end of the high-voltage direct current contactor DCJ1 is used for accessing the external power supply and distribution equipment.
It is to be understood that in the case of a tie switch bay, the tie switch bay may include at least 1 set of non-polar hvdc contactors DCJ 1.
Specifically, high voltage dc contactor DCJ1 is as the interconnection switch, and the second end of interconnection switch can be regarded as the external power supply distribution equipment of direct current interconnection port CP, and the first end of interconnection switch can be connected with predetermineeing the direct current bus.
The direct current connection port CP can be externally connected with another set of pre-installed power supply and distribution system or other direct current bidirectional power supplies.
Further, the tie switch unit 80 may further include a high voltage dc bidirectional meter.
On the basis of the above embodiment, preferably, the direct current distribution unit 50 includes a bidirectional DC/DC conversion unit;
a first direct current side interface of the bidirectional DC/DC conversion unit is connected with a preset direct current bus;
and the second direct current side interface of the bidirectional DC/DC conversion unit is used for accessing a direct current load DCL.
It will be appreciated that in the case of a DC distribution magazine, at least 2 sets of bi-directional DC/DC conversion units with energy storage batteries may be included.
Specifically, the voltages on the DC load DCL side of the bidirectional DC/DC conversion unit may be operated in parallel at the same voltage, and the voltage range of the parallel operation may be 48V to 400V, or of course, the voltages may not be operated in parallel at different voltages. At the same time, the dc loads DCL of the respective voltage classes are fed.
On the basis of the above embodiment, preferably, the alternating current distribution unit 60 includes a DC/AC conversion unit;
the direct-current side interface of the DC/AC conversion unit is connected with a preset direct-current bus;
and the alternating current side interface of the DC/AC conversion unit is used for accessing an alternating current load ACL.
It will be appreciated that in the case of an AC distribution magazine, at least 2 sets of unidirectional DC/AC conversion units with energy storage batteries may be included.
Therefore, the direct current side interfaces of all the conversion units can be connected with the direct current bus in parallel.
In terms of the connection of the preset dc bus bar shown in fig. 2 with other elements, only the connection relationship between the elements is shown, and the connection manner is not limited, for example, the connection manner may be parallel.
Specifically, the DC/AC conversion units may be operated in parallel at the same voltage, and the voltage range of the parallel operation is 110V to 690V, and of course, the DC/AC conversion units may also be operated in parallel at different voltages. At the same time, ac loads ACL of the respective voltage classes are fed.
It can be seen that the direct current power distribution unit 50 and the alternating current power distribution unit 60 provided by the embodiment of the present invention can respectively feed power to the direct current load DCL and the alternating current load ACL of corresponding voltage levels, thereby implementing a self-adaptive power supply behavior.
Furthermore, the full coverage of low-voltage distribution can be realized through diversified distribution units, for example, alternating current of 1KV or below and direct current of 1.5KV or below, so that the defect of single input and output voltage of the traditional power supply and distribution system is overcome.
Further, in view of the fact that the dc power distribution unit 50 and the ac power distribution unit 60 can self-regulate the voltage levels that can be provided, taking the deployment scenario of the edge computing data center as an example, the novel power supply and distribution system provided by the embodiment of the present invention can flexibly adapt to the voltage access points of different voltage levels, the voltage access points of different positions, the variables of different load capacities, and the like.
Meanwhile, the novel power supply and distribution system provided by the embodiment of the invention also has the characteristics of modularization, standardization, rapidness, preassembly and the like.
On the basis of the above embodiment, preferably, the energy storage unit 70 includes a DC/DC conversion unit;
the input end of the DC/DC conversion unit is connected with external energy storage equipment;
and the output end of the DC/DC conversion unit is connected with a preset direct current bus.
It is understood that, in the case of energy storage bins, the energy storage bins may also be referred to as photovoltaic and distributed energy storage bins, without limiting the device type of the external energy storage device.
For example, the external energy storage device may be a photovoltaic energy storage device, a distributed energy storage device.
Specifically, the energy storage unit 70 may include at least 1 set of unidirectional DC/DC conversion units with energy storage batteries.
The input end of the unidirectional DC/DC conversion unit can be marked as a photovoltaic port SP and connected with external energy storage equipment, and the voltage range is 150V-1500V; the output end is connected with a preset direct current bus.
Further, the energy storage unit 70 may further include a unidirectional dc meter.
Furthermore, most of the existing power supply and distribution systems are power consumers, and only can purchase power from the power grid, but cannot sell power from the power grid.
Meanwhile, the energy storage unit 70 can also realize adaptive bidirectional control of voltage.
Fig. 3 is a schematic structural diagram of a preassembled power distribution system according to another embodiment of the present invention, which is based on the embodiment shown in fig. 2.
In this embodiment, the external power supply and distribution equipment is a target pre-installed power supply and distribution system;
the tie switch unit 80 is connected to a target tie switch unit in the target pre-installed power distribution system.
Specifically, the external power supply and distribution equipment may be another preassembled power supply and distribution system having the same structure as the preassembled power supply and distribution system described in this embodiment, in addition to the dc bidirectional power supply.
The other pre-installed power supply and distribution system can be marked as a target pre-installed power supply and distribution system, and the tie switch unit in the target pre-installed power supply and distribution system can be marked as a target tie switch unit.
It can be seen that two pre-assembled power supply and distribution systems can be connected by respective tie switch units. Specifically, two prefabricated power distribution systems may be connected through respective dc link ports CP to multiplex and combine a plurality of prefabricated power distribution systems.
Obviously, the pre-installed power supply and distribution system provided by the embodiment of the invention can realize a rapid, reliable and reusable deployment behavior of the power supply and distribution system due to the structural characteristics of the pre-installed power supply and distribution system.
Moreover, the interconnection switch unit 80 can realize a network type power supply structure under a plurality of sets of systems, and realize intelligent scheduling and intelligent distribution of energy sources in the network.
On the basis of the above embodiments, it is preferable that the independent space units in which the high-voltage power distribution unit 10, the variable-voltage power distribution unit 20, the low-voltage power distribution unit 30, the bidirectional conversion unit 40, the direct-current power distribution unit 50, the alternating-current power distribution unit 60, the energy storage unit 70, and the interconnection switch unit 80 are respectively located are detachably connected to each other.
Specifically, the independent space unit in which the 8 units are located may not only be a specific space region, but also be a space structure like a certain closed type, for example, the independent space unit may be a standard type industrial container.
Wherein the 8 containers are detachably connected to each other. For example, the 8 containers may be connected in the form of slide rails.
Wherein, these 8 containers can be the same size, also can the size is different.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
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